Molding-machine



H. O. MAGNUSON.

MOLDING MACHINE.

APPLICATION FILED MAY 21, 1918.

m m m m 7m J V m w m T Pm A &m 0 m m M km W] TNESSES:

H. 0. MAGNUSON.

MOLDING MACHINE.

APPLICATION FILED MAY 27. 1918.-

1,352,295, PatentedSept. 7, 1920.

2 SHEETS-SHEET 2.

INVENTOR.

WITNESSES: Jfw 0 7 I I ATTORNEYS.

UNITED STATEZSF" HENRYoLMAGNUsoN, or cnrcaeo, ILLINOIS.

PATENT OF.

ICE.

MOLDING-MACHINE.

clamped and then inverted to effect the separation offthe pattern late and pattern from the mold or to with raw the core-box from the core. Manymachines of this gen- .eral'tyPe now in use and commonly known as rock-over machines, are quite cumbersome in lstructure, Occupying considerable floor space and laborious to operate, involving the use of a clamp to secure theflask or core-box in position to be inverted, and necessitating the manual raising and rocking of the. flask orcore-box with the hinged support carrying the same over onto a recelving tableor platform on which the box is deposited bottom side up; the separation of pattern or of the core-box being then effected by hand. I

I The principal object of the present invention is to provide a machine of, simple and compact construction which shall be easier to manipulate, which may be operated by a single attendant from one side, of the machine, and in which the inverting ,operation may be performed witha minimum of labor, and wherein the separation of the pattern from themold or of the corebox from the core may be effected by power'mean's.

These andother desirable objectsare secured b the machine ofthe present invention, wiichis characterized mainly by the provision of an invertible fmold-clamp'ing power-actuated table to supportthe ask or COITG'bOXfE QELblG when raised carrying the flask or .core-box up into clamped relation to v the upper. transversemember of the inverti- Me frame, so that the flask or core-box is se- .curel held while the frame is, inverted. Thls invertible mold-clampin frame is so constructed that, when the mol or core-box is inthe raised andclamped position, the center of gravitylis abovethe pivot axis of the frame sothat it will invert itself'upon a slight push; while when the frame has Specification of Letters'Patent. Patented Application filed May 27, 1918. Serial 1a. 236,732.

inverting frame which, in the ter of gravity of the empty fra'mestructl re in its inverted position is still :abovefthe pivotaxis so that it may be automatically restored to normal slight push.

' Other features of the inventionreside in .means for"counter-balancing' the hinged member ofthe' frame so that it may be easily Thenature of the invention, its structural features, mode operation, and advantages will be readily understood and appreciated or upright position by a Sept. 7, 1920.

been inverted and theflask removed, the cen- V r by those skilled in the art from the follow ing detailed description, taken'in connection with the accompanying drawings wherein'l have illustrated a practical and preferred embodiment of the invention, and in which- Figure 1 is a front elevation of the machine;

Fig. 2 is a vertical section on the line 22 of Fig. 1, with the core-box shown in Fig. 1

omitted;

' Fig.3 is an elevation similar to that shown in Fig. 1, but showing the pivoted frame in clamping and inverted position; I g

a F 1g. 4 1s a fragmentary end elevation as seen'on the line 44 of Fig. 1 with the su porting frame omitted; and

Fig. 5 is a fragmentary detail illustrating the automatic locking device of the upper hinged frame member.

g Referring to ,the drawings, 10 designates the supporting frame of the machine that are suitably connected and bracedby cross bars 11. n the upper end of each" frame member 10 is a journal bearing'lQ in which bearings are supported the trunnions of a generally rectangular mold clamping and referred form here shown, comprises a ower U- shaped member 14 having the trunnions 13, and an upper inverted U-shaped member 15 thereofwith a'vertical sleeve 17 in which each of; a pair of uprightend members of that is pivoted at one end by a pivot shaft is mounted a pneumatic cylinder 18. VVithin the cylinder is a piston 19 connected by a piston-rod 20 to a table or platform 21, said table or platform in its lowered position restin'gupon the upper cylinder head 22 which,i-in turn, is secured to theupper face of the lower frame member 14. On either side of the sleeve 17 are smaller sleeves that form guideways for a pair of depending guide-rods 24 that are rigidly secured to the underside of the table 21, and insure the accurate vertical movements of the latter; The table 21 is designed to support the mold box, which ma be a corebox such as that shown at 25 or the molding of core pieces, or may be the usual molding flask. In the former case the core-box is screwed or clamped to the table, and in the latter case the pattern plate is secured to the table. The motor cylinder is designed to be operated by fluid pressure, preferably compressed air, which enters through a line pipe 26 having .a manually operable controlling valve 27 therein, from which valve are led flexible tubes 28 and 29 through one of the trunnions 13, the former leading into the lower end of the cylinder through a jarring valve 30, and the latter leading into the upper end of the cylinder.

The jarring valve 30 is mounted on the motor cylinder 18, and the plunger thereof is reciprocated through a lever 31 from a rod 32 secured to and depending from the table 21, the lower end of said rod having a foot 33 engaging with a forked arm of the lever 31. By means of a handle 34 on the rod 32 the latter may be turned on its longitudinal axis so as to disengage the foot 33 from lever 31 and thereby interrupt the operation of the jarrin valve when the jarring of the mold has een completed.

The upper member 15 of the mold-clamping and inverting. frame is provided at its free end with a self-locking latch best shown in Fig. 4 and comprising a shaft 35 jour naled in and transversely of the frame member 15 and carrying on its opposite ends a pair of depending latch hooks 36, the lower hooked ends 36 of which engage beneath shoulders 37 formed on the lower frame member 14. The upper end of the right hand arm of the frame member 14,0n which the shoulders 37 are formed, is beveled, as shown at 37 in Fig. 5, and the hook members 36 are correspondingly beveled on their rear sides so as to automatically slide over the shoulders 37 and en age beneath the latter under the influence o a coil spring 38 applied to the shaft35. On one of the depending hook members 36 is a handle 39 by which the latch may be manually released when the upper frame member 15 is to be swung rearwardly for loading the table.

To partially counter-balance the wei ht of the upper frame member 15 and ren er the swinging movements thereof-easy to perform, a counter-balancing spring 40 is applied to the pivot shaft 16, the closing movement of the frame member 15 acting to tension this spring, and the energy of the spring being given out as the frame member is raised and swung back, acting in opposition to the weight of the latter. By employing a sufliciently powerful spring, the weight of the frame member 15 may be practically neutralized so as to render the operation of the latter very easy.

The machine is also equipped with means for automatically locking the mold-clamping and inverting frame in either of its two positions shown in Figs. 1 and 3 respectively. This consists of a segment plate 41 integral with or secured to the left-hand arm of the lower frame member 14 adjacent to the trunnion of the latter, said plate having a pair of notches 42 disposed 180 apart with reference to the axis of the trunnion, and a latch member 43 pivoted on the adjacent frame member 10 and having a locking nose 44 that is normally pressed into engagement with the periphery of the segment plate 41 by a sprin 45 (Fig. 1) on the pivot shaft of the late 43.

Secured to the underside of the transverse member of the upper frame member 15 are a pair of parallel horizontally extending rods or bars 46 that directly engage the top of the core-box or mold when the latter is raised and support the same when the frame is inverted to the position shown in Fig. 3.

In the operation of the machine, the corebox having been fastened to the table, the

upper frame member or yoke 15 is swung rearwardly on its hinge '16, and the corebox is filled with sand. The air is then turned on to the motor and the box is jolted or jarred by the motor, controlled by the 'arring valve '30. As soon as the box has een sufficiently jarred, the core-plate is placed on the core-box, and the member 15 is swung back to working position as shown in Fig. 1, being automatically locked in such position by the latch members 36 as soon as it is returned. The controlling rod 32 ii then turned by the handle 34 to out out t e neat the piston 19 raises the table 21 and Larring valve, and the air entering 'bethe box 25 until the latter is clamped beposition. T e air is then reversed in the The latch 43 is then retracted and 'automaticall locked by the latch'43 in such motor, which causes the table 21 and the box 25 to be raised, leaving the core-plate and core resting on the bars 46, whence they may readily be removed by hand. When the latter have been withdrawn, it leaves the vertin slightly center of ravity of the empty frame again Iiove, the pivot axis, so that by giving the frame member 14 a slight push, the frame swings backto upright position,

the latch 43 having been retracted to permit such movement.

It is believed that the structural features, mode or princi'le of operation, and'the advantages of t e present machine will be practically eliminated. The machine is also characterized by extreme compactness, requlring much less space for its setting up and operation than rock-over machines at present in use. The machine can be operatedwholly from one side, thus saving time of the operator heretofore spent in walking from one side of the machine to the other.

It will be manifest that the apparatus as shown and described may be modified in respect to details of structure and organization without altering the substantial character of the invention or sacrificing any of the advantages inhering therein; hence I reserve all such variations and modifications as fairly fall within the spirit and purview of the appended claims.

I claim:

1. In a molding machine, the combination of a supporting frame, a mold clamping and inverting frame having trunnions on its opposite sides journaled in said supporting frame, said mold-clamping and in frame comprising upper and lower frame members hinged together at one end on a horizontal axis lying transverse to the axis of said trunnions and separably connected to each other at their other ends, a table supported on said lower frame member and itself adapted to support a moldbox, and means for elevating said table within said mold-clamping and inverting frame whereby to clamp the mold-box against said upper frame member.

2. In a molding machine, the combination of a supporting frame, a substantially rectangular mold clamping and inverting frame comprising a generally U-shaped lower member having horizontal trunnions journaled in said supporting frame and an inverted U-shaped upper member hinged at one end to one end of said lower member and separably connected at its other end to the other end of said lower member, a table supported on said lower frame member and itself adapted to support a moldbox, and means for elevating said table within said mold-clamping and inverting frame whereby to clamp the mold-box against said upper frame member.

3; j In a molding machine, the combination of a supporting frame, a mold clamping and inverting frame having trunnions on its opposite sides journaled in said"supp'orting frame, said mold-clamping and inverting frame comprising upper'and lower fr'ame members hinged together at one end; on a horizontal"axis lyingftransverse to the axis of said trunnions and "separably connected .together 'at" their other "ends,= atcylinder mounted in said lower frame member, a piston and piston-rod in said cylinder, a table on the upper end of said piston-rod adapted to support a mold-box, guides in said lower frame member on either side of said cylinder, and guide-rods rigid with said table and slidably engaged with said guides.

4. In a molding machine, the combination of a supporting frame, a substantially rectangular mold-clamping and inverting frame comprising a generally U-shaped lower member having horizontal trunnions journaled in said supporting frame and an inverted U-shaped upper member hinged at one end to one end of said lower member and separably connected at its other end to the other end'of said lower member, a cylinder carried by said lower frame member, a piston and pistonrod in said cylinder, a table on the upper end of said piston-rod adapted to support a mold-box, and means for applying motive fluid to said cylinder whereby the mold-box may be raised and clamped against said upper frame member.

5. In a molding machine, the combination of av supporting frame, a mold-clamping and inverting frame journaled at its opposite sides in said supporting frame, a table, and a table-elevating motor mounted on the lower transverse member of said moldclamping and inverting frame, said parts being in such approximate equilibrium that when a mold box on said table is raised into clamped engagement with the upper trans- ,versemember of said mold-clamping frame the center of gravity of the loaded frame is above its pivotal axis, and when the loaded frame is inverted and the load removed the center of gravity of the inverted frame re mains above the pivotal axis.

6. In a molding machine, the combination of a supporting frame, and a moldclamping and inverting frame comprising a Ill lower frame member having lateral trun frame, and an upper inverted U-shaped frame member hinged at one endto one end of said lower frame member, and a. spring connected to the hinge-pivot of said upper frame member and assisting the opening and opposing the closing swinging movelower frame member having lateral trunnions ournaled in said supporting frame, and an upper inverted frame member hinged atone end to'one end of said lower frame member and at its other end provided with a spring latch for automatically locking it to the other end of said lower frame member when said last named frame ends are brought into meetin relation. f-IENRY o, M GNUSON, 

